Touch display device

Abstract

A touch display device according to an exemplary embodiment of the present inventive concept includes: a plurality of pixel circuits; a plurality of first signal lines respectively connected to the plurality of pixel circuits and extending in a first direction; and a plurality of second signal lines respectively connected to the plurality of pixel circuits and extending in a second direction, wherein at least one signal line among the plurality of first signal lines and the plurality of second signal lines function as a first sensing electrode and a second sensing electrode in the touch mode, respectively.

What is claimed is: 
     
       1. A touch display device comprising:
 a plurality of pixel circuits, each of the plurality of pixel circuits including an organic light emitting element; 
 a plurality of first signal lines respectively connected to the plurality of pixel circuits and extending in a first direction; and 
 a plurality of second signal lines and a plurality of data lines respectively connected to the plurality of pixel circuits and extending in a second direction, 
 wherein at least one signal line among the plurality of first signal lines function as a first sensing electrode and at least one signal line among the plurality of second signal lines function as a second sensing electrode in a touch mode, and 
 wherein the touch display device is driven with time division mode which includes a display mode, a readout mode and the touch mode, the plurality of first signal lines supply an initialization voltage in the display mode, the plurality of second signal lines receive a voltage of at least one node of a pixel circuit in the readout mode, at least one signal line among the plurality of first signal lines supply a touch driving signal in the touch mode, and at least one signal line among the plurality of second signal lines receive a touch detecting signal in the touch mode. 
 
     
     
       2. The touch display device of  claim 1 , wherein
 the plurality of first signal lines are grouped in a predetermined number to form peripheral wiring. 
 
     
     
       3. A touch display device comprising:
 a plurality of pixel circuits, the pixel circuits including a scanning signal line and a data line crossing the scanning signal line; 
 a plurality of first signal lines respectively connected to the plurality of pixel circuits and substantially extending in a first direction; 
 a plurality of second signal lines respectively connected to the plurality of pixel circuits and extending in a second direction; and 
 a plurality of second sensing electrode expansions disposed between adjacent first signal lines of the plurality of first signal lines, 
 wherein the plurality of second sensing electrode extensions and the plurality of second signal lines are disposed on different layers, are connected to each other and cross each other in a plan view, and 
 wherein the plurality of first signal lines are initialization voltage supply lines and the plurality of second signal lines are readout wirings. 
 
     
     
       4. The touch display device of  claim 3 , wherein the plurality of second sensing electrode expansions and the plurality of first signal lines are formed of a same material through a same process. 
     
     
       5. The touch display device of  claim 4 , wherein the plurality of second sensing electrode expansions are formed in a region corresponding to green pixels, respectively. 
     
     
       6. The touch display device of  claim 3 , wherein at least one of the plurality of pixel circuits includes an organic light emitting element, the organic light emitting element includes a first electrode, a second electrode and an organic emission layer disposed between the first electrode and the second electrode, and
 wherein the first electrode and the plurality of second sensing electrode expansions are formed of a same material through a same process. 
 
     
     
       7. The touch display device of  claim 6 , wherein the plurality of second sensing electrode expansions are formed in a region corresponding to green pixels, respectively. 
     
     
       8. The touch display device of  claim 3 , wherein the plurality of second sensing electrode expansions are formed in a region corresponding to green pixels, respectively.